Honolulu Zoological Society
To inspire stewardship of our living world by providing meaningful conversation education and experiences to our community. The zoo emphasizes pacific tropical ecosystems and our values of malama (CARING) and ho'okipa (hospitality).
Honolulu Zoological Society at a glance
In short: Honolulu Zoological Society reported $24K in grants paid in 2025 (a total; its filing lists no individual grants). Source: 2025 IRS Form 990.
- Grants paid (2025)
- $24,301 — reported as a total on the IRS filing, without an itemized list
- +7.4% vs 2024
- Total assets
- $4,683,941
- +4.4% vs 2024
- Revenue (2025)
- $1,411,141
- -8.5% vs 2024
- Net investment income (2025)
- $224,805
- +59.6% vs 2024
- Expenses (2025)
- $1,124,716
- -0.1% vs 2024
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated September 2026.
Who Honolulu Zoological Society funds
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2025, annual grant giving ranged from $5K (2019) to $28K (2022). In 2025 it reported $24K in grants paid, as a total without an itemized list.
Hatched bars: grants paid as reported on the IRS filing, which lists no individual grants for that year.
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2025 | $4,683,941 | $1,411,141 | $1,124,716 | $24,301 | Total only | $224,805 |
| 2024 | $4,484,860 | $1,542,535 | $1,125,515 | $22,617 | Total only | $140,818 |
| 2023 | $4,048,463 | $1,428,090 | $897,357 | $23,200 | Total only | $14,109 |
| 2022 | $3,506,032 | $1,115,263 | $766,171 | $27,840 | Total only | $-22,606 |
| 2021 | $3,321,307 | $953,071 | $774,144 | $27,330 | Total only | $1,776 |
| 2020 | $3,118,365 | $860,336 | $988,190 | $18,000 | Total only | $2,766 |
| 2019 | $3,259,562 | $3,370,836 | $1,144,867 | $5,181 | 1 | $1,627 |
"Total only": grants paid as reported on the IRS filing, which lists no individual grants for that year.
About Honolulu Zoological Society
Based on IRS filings
Honolulu Zoological Society is a public charity focused on Environment & Animals, based in Honolulu, HI. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $4.7M in total assets. In 2025, it reported $24K in grants paid as a total on its IRS filing, without an itemized list. Net investment income was $225K.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Honolulu Zoological Society is led by Mary Benson Non-Voting, Executive Director since 2022 (on filings since 2021); 1 of 17 officers listed in 2025 is compensated.
Officers on the 2025 filing
Mary Benson Non-Voting
Executive Director
Director → Executive Director, 2022
On filings since 2021
40 hrs/week
$77K (2022) → $109K (2025)
Thuy Martines
President
Treasurer → President Elect & Treasurer, 2023
President Elect & Treasurer → President, 2024
On filings since 2022
1 hr/week
No compensation reported
Linda Santos Non-Voting
Director
On filings since 2019
1 hr/week
No compensation reported
Tracy Kubota Non-Voting
Director
On filings since 2019
1 hr/week
No compensation reported
Matt Grauso
Director
On filings since 2021
1 hr/week
No compensation reported
Dee Balfour
Director
On filings since 2022
1 hr/week
No compensation reported
Jacce Mikulanec
Director
On filings since 2022
1 hr/week
No compensation reported
Jake Houseman
Director
On filings since 2022
1 hr/week
No compensation reported
David Pettinger
Director
On filings since 2023
1 hr/week
No compensation reported
Candice Ishikawa
Director
On filings since 2024
1 hr/week
No compensation reported
Dita Holifield Non-Voting
Director
On filings since 2024
1 hr/week
No compensation reported
Shawna Griffiths
Director
On filings since 2024
1 hr/week
No compensation reported
Wendy Taylor
Director
On filings since 2024
1 hr/week
No compensation reported
Ivy Timpe
Vice President
Director → Vice President, 2024
On filings since 2021
1 hr/week
No compensation reported
Alan Yamamoto
Vice President
Director → Vice President, 2024
On filings since 2022
1 hr/week
No compensation reported
Peg Jackson
Secretary
Director → Secretary, 2023
On filings since 2022
1 hr/week
No compensation reported
Paulette Suzuki
Treasurer
On filings since 2024
1 hr/week
No compensation reported
Former officers (23)
- Former: Aimee Lum (2019–2023) — President Emeritus
- Former: Nelisa Asato (2020–2023) — President
- Former: Leslie Campaniano (2021–2023) — Vice President
- Former: Stephanie Sakamoto (2021–2023) — Vice President
- Former: Kimberly Hehir (2022–2023) — Director
- Former: Matthew Pennaz (2022–2023) — Director
- Former: Theodore Rachlin (2023) — Director
- Former: Keith Demello (2019–2022) — Secretary
- Former: Marlee Breese Non-Voting (2019–2022) — Former Executive Director
- Former: Rick Egged (2019–2022) — Director
- Former: Aude Pacini (2019–2021) — Vice President
- Former: Maile Levins (2019–2021) — Director
- Former: Kim Hehir (2020–2021) — Director
- Former: Luther Beck (2021) — Treasurer
- Former: Matt Pennaz (2021) — Director
- Former: Andrew Rosen (2019–2020) — Director
- Former: Caroline Witherspoon (2019–2020) — Director
- Former: Mary Benson (2019–2020) — Co-President
- Former: Michael Libertini (2019–2020) — Treasurer
- Former: Wendy Nagaishi (2019–2020) — Director
- Former: Ikuyo Coppa (2020) — Director
- Former: Barry Sullivan (2019) — Vice President
- Former: Raymond Noh (2019) — Director
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $109K, to Mary Benson Non-Voting (Executive Director).
Frequently asked questions about Honolulu Zoological Society
How much does Honolulu Zoological Society give each year?
Honolulu Zoological Society reported $24K in grants paid in 2025 on its 2025 IRS Form 990, as a total without an itemized list of grants. In 2024 it reported $23K in grants paid.
How large is Honolulu Zoological Society?
Honolulu Zoological Society reported $4.7M in total assets on its 2025 IRS Form 990. Its revenue that year was $1.4M.
What is Honolulu Zoological Society?
Honolulu Zoological Society is a public charity focused on Environment & Animals, based in Honolulu, HI. It holds $4.7M in total assets as of 2025.
Where does Honolulu Zoological Society operate?
Honolulu Zoological Society has awarded grants in Hawaii.
What is Honolulu Zoological Society's EIN?
Honolulu Zoological Society's EIN (Employer Identification Number) is 23-7057714. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(7)
When this profile's IRS filing data changed on Grantable
- Added Form 990 for fiscal year 2019 (received by the IRS July 14, 2020)
- Updated Form 990 for fiscal year 2020 (received by the IRS May 17, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS May 16, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS May 15, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS May 15, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS May 14, 2025)
- Added Form 990 for fiscal year 2025 (received by the IRS August 20, 2026)
Live grants for the work Honolulu Zoological Society funds
Environment & Animals Open opportunities, soonest deadline first.
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Honolulu Zoological Society down — hundreds of funders to go?